Module 4:Meter, Sensor & Transducer

Applications

Module ObjectivesUpon successful completion of this module,

students should be able to:List everyday applications of meters, sensors

and transducersDemonstrate understanding of meter, sensor

and transducerApplications through experiments

Sensors at AirportGuess What are theSensors used at airport

Visibility SensorUsed in airport systems

around the world for airport visibility and in Runway Visual Range (RVR).

Wind SensorProvide information on

winds and turbulence

Metal Detector

Thermal sensors and many more

Introduction to MeterMeters are used for real world measurements

Sound Meter

Heart Beat MeasurementECG

What you cannot measureStress on the brain of human beingLoveQuantity of air in the atmosphereWater in seaNo. of Fish in the seaStars in the sky

Meter Application

Testing a Car BatteryIf the voltage of the car battery is below 12.5

V, it is required to recharge the battery. A fully charged car battery will read at least 12.6 V on the digital multimeter

Testing for continuityTesting of continuity helps in detecting

broken wire, open wire, blown fuses, damaged diodes etc.

Sensors and Transducer Application

Ultrasonic sensors

Ultrasonic sensorsOther applications involve detecting the

presence of a person, and opening a door or detecting the presence of a car in a car wash station.

Detecting presence of materialsDetecting presence of materials/objects is

very important in automation industries

Optical proximity sensors are used for counting boxes, breakage and jam detection

Proximity SensorsA proximity sensor is a sensor able to

detect the presence of nearby objects without any physical contact.

Inductive Sensors principleCapacitive Sensors principle

Detecting presence of materialsInductive proximity sensors are

used to detect the presence of metals while

Capacitive proximity sensors are used to detect metal and even non-metallic objects such as wood, paper, liquid and so on.

However, the detection range of inductive and capacitive proximity sensors is very small.

Lab Activity-1Objective

To use multimeter for the followingTo test the battery and determine the

percentage of batteryTo test continuity of power cordTo test the light emitting diode

Lab Activity-2Objective:

To detect objects within a certain range using the ultrasonic sensors